Hi!! I am pretty new to this .net technology and also new here.....hope you'll help me fix this issue.
I have created a class with name "util.cs" under app_code folder and I have a webform(cars.aspx) in which I have placed a Linkbutton,Dropdownlist,listbox,4imageboxes. when i click on linkbutton it loads three names into dropdownlist,and when i click on any1 of them then 3 other names will be displayed in listbox. now when i select any name in "listbox" 4-images should be displayed into the 4 imageboxes. my requirement is i should not write much code in cars.aspx all the code should be written in util.cs and that should be accesed from cars.aspx....
hope i have made myself clear... 
thanks in advance

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